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BR7101977D0 - CIRCUIT PROCESSES AND PROVISIONS FOR DIGITAL DECODING OF ENCODED FREQUENCY SIGNS - Google Patents

CIRCUIT PROCESSES AND PROVISIONS FOR DIGITAL DECODING OF ENCODED FREQUENCY SIGNS

Info

Publication number
BR7101977D0
BR7101977D0 BR197771A BR197771A BR7101977D0 BR 7101977 D0 BR7101977 D0 BR 7101977D0 BR 197771 A BR197771 A BR 197771A BR 197771 A BR197771 A BR 197771A BR 7101977 D0 BR7101977 D0 BR 7101977D0
Authority
BR
Brazil
Prior art keywords
provisions
circuit processes
digital decoding
encoded frequency
frequency signs
Prior art date
Application number
BR197771A
Other languages
Portuguese (pt)
Inventor
V Diehl
Original Assignee
Ibm
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ibm filed Critical Ibm
Publication of BR7101977D0 publication Critical patent/BR7101977D0/en

Links

BR197771A 1971-04-05 1971-04-05 CIRCUIT PROCESSES AND PROVISIONS FOR DIGITAL DECODING OF ENCODED FREQUENCY SIGNS BR7101977D0 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19712116635 DE2116635C3 (en) 1971-04-05 1971-04-05 Method for digital decoding of frequency-coded signals and circuit arrangement for carrying out the method

Publications (1)

Publication Number Publication Date
BR7101977D0 true BR7101977D0 (en) 1973-06-14

Family

ID=5803944

Family Applications (2)

Application Number Title Priority Date Filing Date
BR197771A BR7101977D0 (en) 1971-04-05 1971-04-05 CIRCUIT PROCESSES AND PROVISIONS FOR DIGITAL DECODING OF ENCODED FREQUENCY SIGNS
BR197772A BR7201977D0 (en) 1971-04-05 1972-04-05 CIRCUIT PROCESSES AND PROVISIONS FOR DIGITAL DECODING OF CONDIFIED FREQUENCY SIGNS

Family Applications After (1)

Application Number Title Priority Date Filing Date
BR197772A BR7201977D0 (en) 1971-04-05 1972-04-05 CIRCUIT PROCESSES AND PROVISIONS FOR DIGITAL DECODING OF CONDIFIED FREQUENCY SIGNS

Country Status (11)

Country Link
JP (1) JPS5317015B1 (en)
BR (2) BR7101977D0 (en)
CA (1) CA974645A (en)
CH (1) CH540622A (en)
DE (1) DE2116635C3 (en)
ES (2) ES401437A1 (en)
FR (1) FR2132303B1 (en)
GB (1) GB1364773A (en)
IT (1) IT947887B (en)
NL (1) NL167827C (en)
SE (1) SE384619B (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3936801A (en) * 1974-09-12 1976-02-03 Bell Telephone Laboratories, Incorporated Multifrequency signal receiver timing circuit
CA1031086A (en) * 1976-03-03 1978-05-09 Northern Electric Company Method and apparatus for translating multiple frequency signalling
DE2712847C3 (en) * 1977-03-23 1979-12-06 Siemens Ag, 1000 Berlin Und 8000 Muenchen Speech-protected, frequency-selective character receiver
US4328398A (en) * 1979-05-22 1982-05-04 Oki Electric Industry Co., Ltd. Digital multi-frequency receiver
DE3026016C2 (en) * 1980-07-09 1984-12-13 Siemens AG, 1000 Berlin und 8000 München Circuit arrangement for demodulating mixed frequencies received at a central station
DE3115151A1 (en) * 1981-04-15 1982-11-11 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Circuit arrangement for evaluating AC signals formed from a plurality of simultaneously transmitted alternating currents with different signal frequencies, in telecommunications systems
SE9202065L (en) * 1992-07-03 1994-01-04 Ericsson Telefon Ab L M Ways to improve receiver sensitivity and speech immunity in DTMF reception

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1511133A (en) * 1966-12-16 1968-01-26 Ass Ouvriers Instr Precision Method for identifying each of the frequencies of a group of several determined frequencies and receiving apparatus for implementing this method
NL6712685A (en) * 1967-09-15 1969-03-18

Also Published As

Publication number Publication date
GB1364773A (en) 1974-08-29
CA974645A (en) 1975-09-16
FR2132303A1 (en) 1972-11-17
ES401437A1 (en) 1975-10-01
FR2132303B1 (en) 1974-08-02
BR7201977D0 (en) 1974-11-12
CH540622A (en) 1973-08-15
JPS5317015B1 (en) 1978-06-05
DE2116635C3 (en) 1978-10-05
DE2116635A1 (en) 1972-10-19
SE384619B (en) 1976-05-10
IT947887B (en) 1973-05-30
ES401435A1 (en) 1975-02-16
NL167827C (en) 1982-01-18
DE2116635B2 (en) 1973-10-04
NL7204207A (en) 1972-10-09

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